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Optical Engineering

Investigation of spectral dependence of shortwave radiation absorption by ambient aerosol using time-resolved photoacoustic technique
Author(s): Alexey B. Tikhomirov; Konstantin M. Firsov; Valerii Stepanovich Kozlov; Mikhail V. Panchenko; Yurii N. Ponomarev; Boris Alexandrovich Tikhomirov
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Paper Abstract

The method of time-resolved photoacoustic spectroscopy is applied to study the weak aerosol absorption of shortwave radiation in the atmospheric air. Using synchronous measurements of aerosol light absorption coefficients by a pulsed photoacoustic spectrometer and mass concentration of black carbon by an Aethalometer, we determine the values of the efficiency σ of aerosol light absorption in the atmospheric air in the shortwave spectral range for three wavelengths: σ (0.532 µm)=(5.49±3.57)m2 g–1, σ(0.694 µm)=(4.46±2.61)m2 g–1, and σ(1.064 µm)=(2.87±1.84)m2 g–1. The experimental results are approximated by the spectral dependence σ(λ)=3.1λ–0.92, where wavelength λ is expressed in micrometers. We discuss the calibration procedure for the pulsed photoacoustic spectrometer in studying the aerosol absorption.

Paper Details

Date Published: 1 July 2005
PDF: 11 pages
Opt. Eng. 44(7) 071203 doi: 10.1117/1.1955327
Published in: Optical Engineering Volume 44, Issue 7
Show Author Affiliations
Alexey B. Tikhomirov, Institute of Atmospheric Optics (Russia)
Konstantin M. Firsov, Institute of Atmospheric Optics (Russia)
Valerii Stepanovich Kozlov, Institute of Atmospheric Optics (Russia)
Mikhail V. Panchenko, Institute of Atmospheric Optics (Russia)
Yurii N. Ponomarev, Institute of Atmospheric Optics (Russia)
Boris Alexandrovich Tikhomirov, Institute of Atmospheric Optics (Russia)

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